Rubidium sulfide
Chemical compound
From Wikipedia, the free encyclopedia
Rubidium sulfide is an inorganic compound and a salt with the chemical formula Rb2S. It is a white solid with similar properties to other alkali metal sulfides.
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| Names | |
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| IUPAC name
Rubidium sulfide | |
| Identifiers | |
3D model (JSmol) |
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PubChem CID |
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CompTox Dashboard (EPA) |
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| Properties | |
| Rb2S | |
| Molar mass | 203.00 |
| Appearance | white crystal |
| Density | 2.912 g/cm3[1] |
| Melting point | 530 °C[2] |
| hydrolyses to rubidium bisulfide[1] | |
| Solubility in ethanol and glycerol | soluble |
| Structure | |
| cubic:anti-fluorite | |
| Hazards | |
| Occupational safety and health (OHS/OSH): | |
Main hazards |
toxic |
| GHS labelling: | |
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| Danger | |
| H314, H400 | |
| P260, P264, P273, P280, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P363, P391, P405, P501 | |
| Related compounds | |
Other anions |
Rubidium oxide Rubidium selenide Rubidium telluride Rubidium polonide |
Other cations |
Lithium sulfide Sodium sulfide Potassium sulfide Caesium sulfide Francium sulfide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Structure
Rubidium sulfide has a cubic crystal similar to lithium sulfide, sodium sulfide and potassium sulfide, known as the anti-fluorite structure. Their space groups are Fm3m. Rubidium sulfide has a crystal lattice unit cell dimension of a = 765.0 pm.[1]
Production
By dissolving hydrogen sulfide into rubidium hydroxide solution, it will produce rubidium bisulfide, followed by rubidium sulfide.[3][4]
- RbOH + H2S → RbHS + H2O
- RbHS + RbOH → Rb2S + H2O
Reactions
Rubidium sulfide reacts with sulfur in hydrogen gas to form rubidium pentasulfide, Rb2S5.[4][5]